<h3 id="example-1">Example 1</h3>

<!-- comment -->

<h3 id="example-2">Example 2</h3>

<!---->

<h3 id="example-3">Example 3</h3>

<!-- -->

<h3 id="example-4">Example 4</h3>

<!-- - -->

<h3 id="example-5">Example 5</h3>

<!-- -- -->

<h3 id="example-6">Example 6</h3>

<!-- --->

<h3 id="example-7">Example 7</h3>

<!----->

<h3 id="example-8">Example 8</h3>

<!------>

<h3 id="example-9">Example 9</h3>

<!-- My favorite operators are > and <!-->

<h3 id="example-10">Example 10</h3>

<!-- multi
line    
comment
-->

<h3 id="example-11">Example 11</h3>

   <!-- indented comment -->

<pre><code>&lt;!-- too much indentation --&gt;
</code></pre>

<h3 id="example-12">Example 12</h3>

<p>&lt;!--&gt; not a comment --&gt;</p>

<p>&lt;!---&gt; not a comment --&gt;</p>

<!-- <!-- not a comment? --> -->

<h3 id="example-13">Example 13</h3>

<!-- block ends at the end of the document since --!>

*is not a valid comment ending*
